Portable power stump-boring machine.



. w. w. LEACH.

PORTABLE POWER STUMP BORRING MACHINE* APPLICATION FILED SEPT- 13. 1914.

11,242,566. ,Patented ot. 9,1917.

4 `SHEETS-SHEET l.

w, w. IIa/ICH.

PORTABLE POWER STUMP BORINGMACHIIIIE.l

APPLICATION FILED SEPT. I8. I9I4.

1,242,566.' Patented (IGI. 9,1917.

4 SHEETS-SHEET 2.

@vi/lineman `w.-vv. LEACH.l PORTABLE POWER STUNIP BORING MACHINE.

APPLICATION FILEDISEPT. I8. 1914. E

4 SHEETS-SHEET 3.

1,242,566. Patented oct. 9,1917.

WMWWM @22M/d A E Ma l E I 3M i awww i W. W. LEACH. PORTABLE POWER STUMP BORING MACHINE.

APPLICATION FILED SEPT. I8. 1914.

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WILLIAM W. BEACH, o

speciiicafipn 'of Leffisratenf.

Patented eene, 19M.

Appiieafien meaisepfember 18,1914. serial 110,862,278.

l 10 all fwmmiz't may G01/Cem Beit'knbwn that I, WILLIAM lV. Llanelli, a citizen of the United Statesof America, yresiding at'Fineland, zin thefcounty of Sabine and State of Texas, have invented certain new andi-useful Improvements in Portable Power Stump-Boring Machines,- of `which the following is a specification.

This invention "relates'to certain new and useful improvements lin portable "power stump boring machines. A

In the 'boring'of holes in 'stumps for the reception of 'powder or dynamiteftoblo'w gup tlie stump, in many casesthestump "is rotte'd or diseased in places and when the auger reaches the trotted pla-ce, which is soft, itis suddenly thrown forward and becomes wedged between the undiseased or liardportions oflthe stump that e'iist onea'chfside of the diseased or `rottedy part and 'wle'nfso wedged -the `auger 'or 'its propellii-igsliaft is likely'tobe broken.

The invention therefore has' for its fprimary object, *automatic stoppage fof the auger, should the saine `bind or beeoine wedged in the stump. Further objects 'ofthe' yinvention Aare 'to' enable the "auger 'to be -tiltedatY 'varying angles to tlie'surfa'ce of the ground so 'as toenable holes to be bored inthe'stuinp vat'fany'"desired angle; to provide'means to -lockthe auger at tlie desired 'angle which lthe-fholeis to liavlef; to fprovide Jfor manual control'o'f'the 'feed of thefauger 'to 'thereby enable saine to be fed forwardfor withdrawn, and 'to pr'ovidenve'l means whereby the 1inotor may bep'ermitted vto operate 'without operation fofV the auger.

Further the invention fai'ms" to' provide meanswliereby- Sthe auger'mvenien'ts may be manually control-led 4so asftprevent/breaks age of saine, for bf any 'of thepa-rts which 'drive gthef'a'ugerl 4,

Still further' the invention faimsto provide means whereby tlieentireiiiacliine may be easily andv conveniently transport'edY by two men.

Figure 1 is a top plan view 'of'ftlie invention;

Fig. 2 is al section. onY the line -A of Figl;

Fig. 4 is' elevation dienende' ef the machine;

. VVFigs is a detail `viewof:on'e'oftli'e carry'- ingbars;

Fig. 61sa 4side elevation of thefopposite Fig. .1011s a aerea Siia'eeievauen of the augerfhead; i

Fig. nlil 'sa section on the `=line"X-'-'X of Fig. V91; t'and v Fig. v'l2 isaside elevation of the auger head. 1

In-"accordance 'with the present iI'ivei1-`y tion, fa iframe -i's @employed whichl includes' la pair oif spaced longitudinal inverted "U-'b'ar's lfand 2 the lowero'r free-ends of which provide legs 4C, y5, GF'an'd 7, the bars being connected by ay transverse ybar 8: Upper `longitudinal braces 9 and IO andlo'wr'loiigitudinal bracesy ll-l'fand 12' are boltedat theirffrear ends to 'the bar 8' and ihave their 'front `ends diverging and bolted to the lngitii'din'al bars lY and LQ The'v upper and lower longitudinal 'braces just 'mentioned have their major portions "arranged" 'in spa-@ed relation: Y Y j The' propellingmean-S -for theiaugeri ednsists of a motorie', theeasing 5 17f 'of whichr is provided 'with lugs 19 20 whi'chfa're secured ltoftbe bra'ee's by. means ofblts 21", tlife nioto'r having'an'faugula'r` relation to the Ytrarne las ndepicted in Fig-1 6'. Q

`The rauger supporting means whiehl "enables the auger to Lbe"r'rioved itoV 'varying 'angular positions so las `to'fb'o're"holesinfthe stu-inps at varying angles-*tb theis'ufr'face "of the fgr'ound, includes 1a" lieadrha'ving trunj nio'ns 26 andi 27 which latter are prov' ed with jeumai's' 28 and e9 retatablyfreeeived within journal' boxes 22 af'nd 23 seei'red-y to (the frame ibars land 2 fadjaeentthe top'portions of the latter. 1 f

`Mounted"within the head 5215 isf ajbvel gear 30 :whiclilias journals 31" llarfd 32 rev- 4ol'ubly borne by the lieajd, the gear ine's'hing with' 4'a bevel pinion 34' secured' on fa sli-aft B3, the' sliaft 33 being journaled in the ft'runnion arm 27. A 'disk 36' is rigidly secured by asfcrew 37150 *the slra-f-t fjai'idengages OneV fa OV-'aber Washer 38 'tl-ii'l plafed fon: the slaiiirfl A; *slieam` pulley lilifav'in'g a web 39 is mounted on shaft 33 and its said web on one face engages the opposite face of the liber washer 38 and the opposite face of the pulley web 39 engages a similar fiber washer 41 which is also mounted on the shaft 33. rThe washer 4l is engaged by a disk 42 which has a square aperture that receives the squared end 43 of the shaft 3 and also has a hub 44 which is bored to receive a coil spring 45 which latter abuts the disk 42 and a nut 46 threaded onto the shaft 33, the spring acting to exert tension on the disk 42 to force the latter and the Washers 41 and 38 and the pulley web 39 into frictional engagement with each other.

lt will be apparent from the foregoing that the disks 36 and 42 and the washers 38 and 41 act to provide a friction clutch for the pulley 40, the frictional engagement of the parts being controlled by the tension of the spring 45, which latter may be regulated by turning of nut 46 to cause greater or less frictional contact between the parts, as desired. Obviously, if the strain on the shaft 33 exceeds or overcomes the extent of frictional engagementbetween the parts of the clutch, then slippage will occur in the latter and the shaft 33 will consequently remain stationary, preventing undue forcible rotation of the auger, such as might break or damage the latter.

The gear 30 is provided with a central aperture 47 (Fig. 12) and a key-way 4S which communicates therewith for the purpose of slidably receiving the stem 49 that carries the chuck 50 of the auger 51, the stem having a feather key 52 which slides in the key-way 48.- Rotation of the pulley 40 drives shaft 33 by virtue of the friction clutch and since gear 30 meshes with pinion 34 on shaft 33, it will be seen that the auger stem 49 will be driven by reason of its connection with gear 30. For the purpose of sliding the auger or feeding same to the work, a hand operating wheel 54 is rigidly secured to the auger stem 49. By manipulation of the wheel 54, the operator may move the stem and therewith the auger back and forth and in addition the wheel 54 serves as a means whereby the operator may manually turn or rotate the auger. A knob 55 is loosely journaled on the outer end of stem 49 and is Aused for the purpose of exerting pressure on the stem 49 to move the latter back and forth when the stem is being power operated.

For the purpose of holding the auger rigidly in any of its adjustments to obtain varying angular disposition thereof, a sector 56 is provided, Fig. 2, the sector having a clamp 57 fitted on the trunnion arm 26 and held rigid thereon by a bolt 57. rlhe sector further has an arc-shaped slot 58 through' which a bolt 59 passes. rllhe bolt receives a washer 60 thereon (Fig. 3) and has a squared portion 59 which is received in a square aperture provided therefor in the frame bar 1. The threaded end of bolt 59 receives a washer 61 thereon which abuts the opposite side of frame bar 1 and also a clamping lever 62 which can be manually operated to tighten the bolt and thereby hold the sector rigid in any position which the sector is capable of being moved to.

The crank shaft 63 of the motor has a sheave pulley 64 thereon over which and the pulley 40, a belt 65 engages, to transmit movement from the pulley 64 of the motor to the pulley 40.

For the ypurpose of relieving the crank shaft of excessive strain and to obviate undue vibration, a bearing 66 is fitted to the crank shaft 63 and is supported by the hanger 67, the ends of which are fastened to the frame bar 2.

rfhe motor is started by a mechanism which forms the subject matter of co-pending application, Serial No. 862,279, filed September 18, 1914, and in briefincludes a strap 7 2 wound on a drum connected to the crank-shaft of the motor and a drum 73 also rigid on the motor shaft, which drum 73 is connected by a cable 74 to a spring wound drum 74, a clutch 73 being mounted on the motor shaft one part of which clutch is connected to the drum 73 and the other part of which is connected to the motor shaft, sothatwhen strap 72 is pulled the clutch will rotate the motor shaft and at the same time, through cable 74 wind spring drum 74, whereby upon release of strap 72 the drum 74 will again rewind the strap on its drum to again reset the parts ready for a second operation.

When the motor is inoperation, belt 65 rotates loosely around'pulley 64 and pulley 40, and when it is desired to drive the pulley 40, the belt 65 is tightened by pulling upon a lever 75 which is pivoted at 76 to the frame bar 1 and is connected by a link 7 7 to a crank 7 8 formed on a rock shaft 79, the latter having a crank 80 on which an idler pulley 81 is mounted and is ladapted to bear so as to tighten the belt to any desired extent. Aprack bar 82 is fastened to the frame and is adapted to hold the lever 75 in any of its adjusted positions.

For the purpose of enabling the machine to be easily and conveniently transported, a pair of parallel carrying bars 83 and 84 are secured to the frame by the clips 71 and other clips 85 respectively. The carrying bar 84 is provided with a loop 35 so as t0 allow ythe auger to have desired vertical up movement.

lin operation the motor is started and the head adjusted and set to the proper angle. rlfhe operator now pulls on lever 75 forcing idler 81 into engagement with the belt 65 thereby driving the auger through means of the gear 30, pinion 34, shaft 33 and pulley 40. The hole is now bored in the stump and upon completion of the boring operation the auger is withdrawn.

Should however, the auger by reason of striking a rotted portion in the stump be wedged therein, then the friction clutch will rotate without rotation of the auger, whereupon the operator throws lever 75 so as to move idler pulley 81 out of engagement with the belt and then withdraws the auger partiallyr from the hole being ydrilled by means of the hand 'wheel 54. The operator now again moves pulley 81 to tighten the belt and to drive the auger and Gradually refeeds the auger into the hole bv means of wheel 54, until the auger is 'normally r0- tating whereupon wheel 54 is released and the feed of the auger is continued by grasping knob 55.

The Vbelt idler mechanism allows the motor shaft to be rotated by the means before mentioned, for starting purposes without operating the auger.

Roughened feet 86 may be secured to the legs 5, if desired, so as to bite into the ground and thus anchor the frame.

Vhat is Claimedv is:

1. In combination with a frame including side bars, a head having trunnions journaled on the side bars of the frame, an auger borne by the head and movable therewith to be angularly adjusted in a vertical plane, a removable sector angularly adjustably clamped on one of the trunnionsfand positioned to lie next the inner side of the adjacent side bar, said sector being formed with a slot, the specied side bar being provided with an aperture of angular section, a headed bolt passing through the sector slotV and Aslidably engaged in the aperture of the side bar, the opposite end of the bolt being threaded and projecting from the outer side of Jthe bar, and a clamping lever engaged with the threaded end of the bolt to slide the latter for holding the sector rigid. l

' 2. In a stump boring machine, in eombi` nation with a frame, a hollow cylindrical head havinga removable disk closing one end, radial, oppositely extending, relatively long/tubular projections having terminal trunnions journaled on the frame, an auger, a gear housed by the head, and journaledin its disk ends, a stem slidable through the gear and carrying the auger on one end, and a drive for the gear including a shaft extendin G' through one of the trunnions, and into the head and journaledat both ends.

In testimony whereof I afiX mv signature in presence of two witnesses.

' WILLIAM W. LEACH.

Witnesses: v

D. R. BAXTER, S; P. MCELROY.

Copies of this patent may be obtained for ve cents each, by addressing` the Commissioner of Patents,

' Washington, D. G." 

